#ifndef _COMPLEX_H_ #define _COMPLEX_H_ #include namespace complex { class Complex { public: // Copy constructor -- should we pass a reference or not? // (Answer: ?) Complex(const Complex& copyme) { real_ = copyme.real_; imag_ = copyme.image_; } private: double real_, imag_; }; // class Complex } // namespace complex #endif // _COMPLEX_H_